Salmonella is a bacillus bacteria, a facultative anaerobe, gram negative, and in the family Enterobacteriaceae. They are also chemotrophs, which means they receive their energy from oxidation and reduction reactions from organic sources. A bacillus bacteria means Salmonella is rod-shaped. Facultative anaerobe means that this bacteria can live with or without oxygen. Gram negative means that the cell envelope structure is different than those of gram positive. They have a cytoplasmic membrane, and there is a space between the cytoplasmic membrane and the outer membrane. This space is called periplasm, which contains the peptidoglycan layer.
